package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.mapper.EmployeeMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.EmployeeService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {
    @Autowired
    private SetmealService setmealService;
    @Autowired
    private DishService dishService;
    //根据id删除分类,删除前做一个判断
    @Override
    public void remove(Long id) {
        //添加查询条件,根据分类ID进行查询菜品数据
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();
        dishLambdaQueryWrapper.eq(Dish::getCategoryId,id);
        int count1 = dishService.count(dishLambdaQueryWrapper);
        //如果已经关联,抛出一个业务异常
        if (count1 >0){
            //如果关联着菜品就不能删除然后会出现一个异常,把这个异常捕获了然后给出一句话
            throw new CustomException("当前分类下关联了菜品,不能删除");
        }
        //查询当前分类是否关联了套餐,如果已经关联,抛出一个业务异常
        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper = new LambdaQueryWrapper<>();
        setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);
        int cout2=setmealService.count(setmealLambdaQueryWrapper);
        if (cout2 >0){
            throw new CustomException("当前分类下关联了套餐,不能删除");
        }
        //正常删除分类
        super.removeById(id);

    }
}

